From d32a410d2348105e22ba81fa28820a5a43d273a1 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Sat, 13 Aug 2016 16:44:43 -0400
Subject: clean up bash aliases

---
 .config/bash/rc.d/10_aliases.sh | 79 ++++++++++++++++++++++++-----------------
 1 file changed, 46 insertions(+), 33 deletions(-)

diff --git a/.config/bash/rc.d/10_aliases.sh b/.config/bash/rc.d/10_aliases.sh
index 1b25f93..de30c91 100644
--- a/.config/bash/rc.d/10_aliases.sh
+++ b/.config/bash/rc.d/10_aliases.sh
@@ -62,6 +62,14 @@ if [ -x "`which dircolors`" ]; then
 			command diff "$@"
 		fi
 	}
+
+	diffstat() {
+		if [[ -t 1 ]]; then
+			command diffstat -C "$@"
+		else
+			command diffstat "$@"
+		fi
+	}
 else
 	alias ls='ls -1v'
 	alias dir='dir -v'
@@ -79,7 +87,6 @@ alias l='ls -CF'
 # Some preferences for miscellaneous stuff                           #
 ######################################################################
 #alias rm='gvfs-trash'
-#alias sed='sed --follow-symlinks' # breaks operating on stdio in GNU sed 4.2.2
 alias tree='tree --charset utf8'
 alias cd=pushd
 alias gitk='gitk --all --date-order'
@@ -98,42 +105,48 @@ term-title() {
 	printf "$fmt" "$*"
 }
 mvln() {
-	local target link
-	if [[ ! -L "$1" ]]; then
-		libremessages error 'Not a soft link: %s' "$1"
-		return 1
-	fi
-	if [[ -d "$2" ]]; then
-		link="$2/${1##*/}"
-	else
-		link="$2"
-	fi
-	target=$(readlink -f -- "$1") || return 1
-	ln -srT -- "$target" "$link"
-	if cmp -- "$1" "$link"; then
-		rm -f -- "$1"
-	else
-		libremessages error 'Failed moving link: %s -> %s' "$1" "$link"
-		return 1
-	fi
+	local name=mvln
+	local verbing=moving
+	_cpln "$@"
 }
 cpln() {
-	local target link
-	if [[ ! -L "$1" ]]; then
-		libremessages error 'Not a soft link: %s' "$1"
-		return 1
-	fi
-	if [[ -d "$2" ]]; then
-		link="$2/${1##*/}"
-	else
-		link="$2"
-	fi
-	target=$(readlink -f -- "$1") || return 1
-	ln -srT -- "$target" "$link"
-	if ! cmp -- "$1" "$link"; then
-		libremessages error 'Failed copying link: %s -> %s' "$1" "$link"
+	local name=cpln
+	local verbing=copying
+	_cpln "$@"
+}
+_cpln() {
+	if [[ $# -lt 2 ]]; then
+		libremessages error 'Usage: %s FILES... DEST' "$name"
 		return 1
 	fi
+	declare -i i=1
+	while [[ $i -lt $# ]]; do
+		local src dst target link
+		src="${!i}"
+		dst="${!#}"
+		if [[ ! -L "$src" ]]; then
+			libremessages error 'Not a soft link: %s' "$src"
+			return 1
+		fi
+		if [[ -d "$dst" ]]; then
+			link="$dst/${1##*/}"
+		else
+			link="$dst"
+		fi
+		target=$(readlink -f -- "$src") || return 1
+		ln -srT -- "$target" "$link"
+		# using `cmp` instead of `[ "$src" -ef "$link" ]` has
+		# the use-case where "$link" was a pre-existing link
+		# to a duplicate of "$src".
+		if ! cmp -- "$src" "$link"; then
+			libremessages error 'Failed %s link: %s -> %s' "$verbing" "$src" "$link"
+			return 1
+		fi
+		if [[ "$name" = mvln ]]; then
+			rm -f -- "$src"
+		fi
+		i+=1
+	done
 }
 jarls() {
 	jar tf "$1" |
-- 
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